/**
 * Copyright (C) 2008 Happy Fish / YuQing
 * FastDFS Java Client may be copied only under the terms of the GNU Lesser
 * General Public License (LGPL).
 * Please visit the FastDFS Home Page http://www.csource.org/ for more detail.
 */
package org.csource.fastdfs;


/**
 * Download file callback interface
 * 
 * @author Happy Fish / YuQing
 * @version Version 1.4
 */
public interface DownloadCallback {
    /**
     * recv file content callback function, may be called more than once when the file downloaded
     * 
     * @param file_size
     *            file size
     * @param data
     *            data buff
     * @param bytes
     *            data bytes
     * @return 0 success, return none zero(errno) if fail
     */
    public int recv(long file_size, byte[] data, int bytes);
}
